1 files changed, 44 insertions, 0 deletions
diff --git a/devtools/shared/protocol/utils.js b/devtools/shared/protocol/utils.js
new file mode 100644
index 0000000000..3433c2f446
--- /dev/null
+++ b/devtools/shared/protocol/utils.js
@@ -0,0 +1,44 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/**
+ * Find Placeholders in the template and save them along with their
+ * paths.
+ */
+function findPlaceholders(template, constructor, path = [], placeholders = []) {
+  if (!template || typeof template != "object") {
+    return placeholders;
+  }
+
+  if (template instanceof constructor) {
+    placeholders.push({ placeholder: template, path: [...path] });
+    return placeholders;
+  }
+
+  for (const name in template) {
+    path.push(name);
+    findPlaceholders(template[name], constructor, path, placeholders);
+    path.pop();
+  }
+
+  return placeholders;
+}
+
+exports.findPlaceholders = findPlaceholders;
+
+/**
+ * Get the value at a given path, or undefined if not found.
+ */
+function getPath(obj, path) {
+  for (const name of path) {
+    if (!(name in obj)) {
+      return undefined;
+    }
+    obj = obj[name];
+  }
+  return obj;
+}
+exports.getPath = getPath;